AMAZING WEEK! The environment is reading for flowering. Lighting, feeding, watering, air temp and CO2 are all stable and should give my plants a stress free life. Humidity is still high, so I'll need to come up with a plan for dealing with that ASAP. I've introduced CO2 into the grow with my brand new AirBomz unit. It uses a light sensor that releases CO2 when the lights turn on, and then uses a timer to release every 2hrs until the light switch off. I doubt I'll reach the 1200PPM stated by the manufacturer, mainly because I'm running an extraction, but I figure some is better than none. Cool controller also included. After doing some reading I can see there's two things that I need to look out for: A) Switching off the extraction so it doesn't suck away the precious CO2 before the plants have had a chance to absorb it B) Making sure the room doesn't get too hot whilst the extraction is off, causing heat stress My solution is: A) Switch off extraction for 15mins at the AirBomz 2hr interval B) Use the Temp Controller the switch off the circulation fan when temp exceeds 27C C) Controller then switches on the active intake when temp exceeds 28C D) Temp is held at 29C whilst the extraction is off D) Extraction turns back on after 15 mins, temp drops below 27C E) Temp controller switches off active intake... F) ...And switches on the circulation fan G) Repeats every 2hrs NEXT WEEK: Work out how much the girls are drinking! I'll know when I change the reservoir.